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Related Concept Videos

The Placebo Effect01:54

The Placebo Effect

The placebo effect occurs when people's expectations or beliefs influence or determine their experience in a given situation. In other words, simply expecting something to happen can actually make it happen.
Blind Procedures02:07

Blind Procedures

Ideally, the people who observe and record the children’s behavior are unaware of who was assigned to the experimental or control group, in order to control for experimenter bias. Experimenter bias refers to the possibility that a researcher’s expectations might skew the results of the study. Remember, conducting an experiment requires a lot of planning, and the people involved in the research project have a vested interest in supporting their hypotheses. If the observers knew which child was...
Blinding01:11

Blinding

Blinding is a commonly used method of not telling participants which treatment a subject is receiving. Blinding is a critical part of a randomized control trial or RCT. It reduces the bias that affects the results. In an RCT, blinding is used in the form of a placebo. A placebo effect occurs when untreated subjects falsely believe they have received the treatment and report improved symptoms. A placebo or a dummy treatment is administered to subjects to negate the bias caused by such an effect.
Classical Conditioning in Daily Life01:17

Classical Conditioning in Daily Life

Classical conditioning, a fundamental principle of associative learning, explains various phenomena observed in daily life, such as fear development, the placebo effect, taste aversion, and drug habituation. These applications demonstrate the profound impact of associative learning on human behavior and physiological responses.
John B. Watson and Rosalie Rayner famously demonstrated the development of fear through classical conditioning in their experiment with Little Albert. They paired the...
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Cause and Effect

While variables are sometimes correlated because one does cause the other, it could also be that some other factor, a confounding variable, is actually causing the systematic movement in our variables of interest. For instance, as sales in ice cream increase, so does the overall rate of crime. Is it possible that indulging in your favorite flavor of ice cream could send you on a crime spree? Or, after committing crime do you think you might decide to treat yourself to a cone?
Regression Toward the Mean01:52

Regression Toward the Mean

Regression toward the mean (“RTM”) is a phenomenon in which extremely high or low values—for example, and individual’s blood pressure at a particular moment—appear closer to a group’s average upon remeasuring. Although this statistical peculiarity is the result of random error and chance, it has been problematic across various medical, scientific, financial and psychological applications. In particular, RTM, if not taken into account, can interfere when researchers try to extrapolate results...

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How to Study Placebo Responses in Motion Sickness with a Rotation Chair Paradigm in Healthy Participants
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The placebo effect: why we should care.

Francisco Tausk1, Robert Ader, Nana Duffy Smith

  • 1Department of Dermatology University of Rochester School of Medicine and Dentistry, Box 697, Rochester, NY 14642, USA. francisco_tausk@URMC.Rochetser.edu

Clinics in Dermatology
|December 19, 2012
PubMed
Summary
This summary is machine-generated.

Placebos are not inert and significantly impact pharmacotherapeutic study outcomes. Understanding placebo mechanisms and brain localization can enhance clinical trial design and treatment efficacy.

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Area of Science:

  • Neuroscience
  • Pharmacology
  • Clinical Trials

Background:

  • Placebos, contrary to their definition, are not inert substances.
  • They elicit meaningful physiological responses that influence pharmacotherapeutic study outcomes.
  • Modern imaging and detailed studies are elucidating placebo mechanisms and brain localization.

Purpose of the Study:

  • To highlight that placebos are active mediators of outcomes in pharmacotherapeutic research.
  • To discuss the neurobiological underpinnings of the placebo effect.
  • To propose the integration of classical conditioning principles in clinical trial design to leverage placebo effects.

Main Methods:

  • Review of existing literature on placebo effects.
  • Analysis of neuroimaging studies identifying brain centers involved in placebo responses.
  • Conceptual framework for incorporating classical conditioning into clinical trial design.

Main Results:

  • Placebo administration is associated with significant, measurable physiological and neurological changes.
  • Specific brain regions are activated during placebo responses, indicating a biological basis.
  • Classical conditioning can modulate placebo effects, enhancing their therapeutic potential.

Conclusions:

  • Placebo effects are biologically mediated and significantly impact treatment outcomes.
  • Understanding these mechanisms allows for the design of more effective clinical trials.
  • Leveraging placebo effects through methods like classical conditioning offers novel therapeutic strategies.